A longitudinal study of human immunodeficiency virus transmission by heterosexual partners. European Study Group on Heterosexual Transmission of HIV

An HIV-preventive intervention for youth living with HIV

As the number of youth infected with HIV rises, secondary prevention programs are needed to help youth living with HIV meet three goals: (a) increase self-care behaviors, medical adherence, and health-related interactions; (b) reduce transmission acts; and (c) enhance their quality of life. This article describes an intervention program for youth living with HIV. Youth engage in small-group activities with other infected peers to modify their behavioral patterns. The intervention aims to (a) reduce substance use and sexual behaviors that may transmit or enhance transmission of the HIV virus; (b) reduce negative impacts of substance use on seeking and utilizing health care, assertiveness, and adherence to health regimens; and (c) enhance the quality of life to maintain behavior changes over time. Interventions that target youth living with HIV are warranted. A variety of delivery strategies are discussed for secondary interventions.

Routine testing to reduce late HIV diagnosis in France

Although around half the French population has had an HIV test, many people are still not diagnosed until the disease is advanced. Cyrille Delpierre and colleagues believe the answer is to expand routine testing

The influence of hormonal contraceptive use on HIV-1 transmission and disease progression

Women account for nearly one-half of new human immunodeficiency virus type 1 (HIV-1) infections worldwide, including the majority of infections in Africa. Biological and epidemiological studies suggest that hormonal contraceptive use could influence susceptibility to HIV-1, as well as infectivity and disease progression for those who become infected. However, not all studies have shown this relationship, and many questions remain. Safe and effective contraceptive choices are essential for women with and at risk for HIV-1 infection. Thus, understanding the effect, if any, of hormonal contraception on HIV-1 disease among women is a public health priority.

Association of educational attainment with HIV risk in African American active injection drug users

This study explored the association between educational attainment and HIV/AIDS risk among African American active injection drug users (IDUs) in Chicago, US. Using snowball sampling techniques, 813 African American active IDUs were recruited for semi-structured interviewing and HIV counseling, testing and partner notification. Logistic regression examined the relationship between level of education attained (three categories: less than high school; equivalent to high school; and greater than high school) and HIV risk behaviors (12 unsafe sex and drug-related practices) and HIV serostatus (positive or negative). Compared with the reference category (less than high school education), those with education equal to high school were less likely to share water, p = 0.044, OR = 0.70 (95%CI: 0.50-0.99). Compared with the reference category, those with education greater than high school were less likely to receive money for sex, p = 0.048, OR = 0.62 (95%CI: 0.38-0.99); share needles with person having HIV or AIDS, p = 0.015, OR = 0.58 (95%CI: 0.37-0.90); and test positive for HIV, p = 0.027, OR = 0.58 (95%CI: 0.36-0.94). The significant associations found between educational attainment and certain HIV risk behaviors and HIV serostatus have implications for tailoring HIV prevention efforts for less educated African American IDUs.

Mucosal innate immune response associated with a timely humoral immune response and slower disease progression after oral transmission of simian immunodeficiency virus to rhesus macaques

Mucosal transmission is the predominant mode of human immunodeficiency virus (HIV) infection worldwide, and the mucosal innate interferon response represents an important component of the earliest host response to the infection. Our goal here was to assess the changes in mRNA expression of innate mucosal genes after oral simian immunodeficiency virus (SIV) inoculation of rhesus macaques (Macaca mulatta) that were followed throughout their course of disease progression. The SIV plasma viral load was highest in the macaque that progressed rapidly to simian AIDS (99 days) and lowest in the macaque that progressed more slowly (>700 days). The mRNA levels of six innate/effector genes in the oral mucosa indicated that slower disease progression was associated with increased expression of these genes. This distinction was most evident when comparing the slowest-progressing macaque to the intermediate and rapid progressors. Expression levels of alpha and gamma interferons, the antiviral interferon-stimulated gene product 2'-5' oligoadenylate synthetase (OAS), and the chemokines CXCL9 and CXCL10 in the slow progressor were elevated at each of the three oral mucosal biopsy time points examined (day 2 to 4, 14 to 21, and day 70 postinfection). In contrast, the more rapidly progressing macaques demonstrated elevated levels of these cytokine/chemokine mRNA at lymph nodes, coincident with decreased levels at the mucosal sites, and a decreased ability to elicit an effective anti-SIV antibody response. These data provide evidence that a robust mucosal innate/effector immune response is beneficial following lentiviral exposure; however, it is likely that the anatomical location and timing of the response need to be coordinated to permit an effective immune response able to delay progression to simian AIDS.

Hormonal contraception and the risk of HIV acquisition

BACKGROUND

Combined oral contraceptives (COC) and depot-medroxyprogesterone acetate (DMPA) are among the most widely used family planning methods; their effect on HIV acquisition is not known.

OBJECTIVE

To evaluate the effect of COC and DMPA on HIV acquisition and any modifying effects of other sexually transmitted infections.

METHODS

This multicenter prospective cohort study enroled 6109 HIV-uninfected women, aged 18-35 years, from family planning clinics in Uganda, Zimbabwe and Thailand. Participants received HIV testing quarterly for 15-24 months. The risk of HIV acquisition with different contraceptive methods was assessed (excluding Thailand, where there were few HIV cases).

RESULTS

HIV infection occurred in 213 African participants (2.8/100 woman-years). Use of neither COC [hazard ratio (HR), 0.99; 95% confidence interval (CI), 0.69-1.42] nor DMPA (HR, 1.25; 95% CI, 0.89-1.78) was associated with risk of HIV acquisition overall, including among participants with cervical or vaginal infections. While absolute risk of HIV acquisition was higher among participants who were seropositive for herpes simplex virus 2 (HSV-2) than in those seronegative at enrolment, among the HSV-2-seronegative participants, both COC (HR, 2.85; 95% CI, 1.39-5.82) and DMPA (HR, 3.97; 95% CI, 1.98-8.00) users had an increased risk of HIV acquisition compared with the non-hormonal group.

CONCLUSIONS

No association was found between hormonal contraceptive use and HIV acquisition overall. This is reassuring for women needing effective contraception in settings of high HIV prevalence. However, hormonal contraceptive users who were HSV-2 seronegative had an increased risk of HIV acquisition. Additional research is needed to confirm and explain this finding.

Who benefited from an efficacious intervention for youth living with HIV: a moderator analysis

An efficacious intervention that results in young people living with HIV (YPLH) reducing their transmission risk has been identified. The present study identifies who is most likely to benefit from the intervention. Regression models were used to examine whether background contextual factors moderated the intervention's success. Percentage of protected sex was moderated by ethnicity, use of antiretroviral medications (ARV), healthcare utilization and mental health. Number of partners was moderated by anxiety and depression. When deciding if an intervention is appropriate and beneficial for an individual young person, consideration must be given to type of services the youth currently accesses and the youth's mental health.

The role of sexually transmitted infections in male circumcision effectiveness against HIV--insights from clinical trial simulation

Background

A landmark randomised trial of male circumcision (MC) in Orange Farm, South Africa recently showed a large and significant reduction in risk of HIV infection, reporting MC effectiveness of 61% (95% CI: 34%–77%). Additionally, two further randomised trials of MC in Kisumu, Kenya and Rakai, Uganda were recently stopped early to report 53% and 48% effectiveness, respectively. Since MC may protect against both HIV and certain sexually transmitted infections (STI), which are themselves cofactors of HIV infection, an important question is the extent to which this estimated effectiveness against HIV is mediated by the protective effect of circumcision against STI. The answer lies in the trial data if the appropriate statistical analyses can be identified to estimate the separate efficacies against HIV and STI, which combine to determine overall effectiveness.

Objectives and Methods

Focusing on the MC trial in Kisumu, we used a stochastic prevention trial simulator (1) to determine whether statistical analyses can validly estimate efficacy, (2) to determine whether MC efficacy against STI alone can produce large effectiveness against HIV and (3) to estimate the fraction of all HIV infections prevented that are attributable to efficacy against STI when both efficacies combine.

Results

Valid estimation of separate efficacies against HIV and STI as well as MC effectiveness is feasible with available STI and HIV trial data, under Kisumu trial conditions. Under our parameter assumptions, high overall effectiveness of MC against HIV was observed only with a high MC efficacy against HIV and was not possible on the basis of MC efficacy against STI alone. The fraction of all HIV infections prevented which were attributable to MC efficacy against STI was small, except when efficacy of MC specifically against HIV was very low. In the three MC trials which reported between 48% and 61% effectiveness (combining STI and HIV efficacies), the fraction of HIV infections prevented in circumcised males which were attributable to STI was unlikely to be more than 10% to 20%.

Conclusion

Estimation of efficacy, attributable fraction and effectiveness leads to improved understanding of trial results, gives trial results greater external validity and is essential to determine the broader public health impact of circumcision to men and women.

Prospective study of hormonal contraception and women's risk of HIV infection in South Africa

BACKGROUND

Many women using hormonal contraceptives are also at risk of sexually transmitted HIV infection, but data are mixed on whether hormonal contraception increases women's risk of HIV. We investigated associations between HIV incidence and use of combined oral contraceptives (COC), norethindrone enanthate (NET-EN) or depot medroxyprogesterone acetate (DMPA) in a cohort of South African women.

METHODS

Participants were 4200 HIV-negative women aged 35-49 years enrolled into a cervical cancer screening trial. At enrollment, women were tested for sexually transmitted infections and reported on their sexual behaviour and contraceptive use. During the 24 months of follow-up, women reported on their sexual behaviours and contraceptive use and underwent repeat HIV testing.

RESULTS

During the 5010 person-years of follow-up, 111 incident HIV infections were observed (HIV incidence, 2.2 infections/100 person-years). At enrollment, 21% of women reported using hormonal contraception, primarily DMPA (14% of all women) or NET-EN (5%). After adjusting for sexual risk behaviours and sexually transmitted infections, the incidence of HIV was similar among women using COC, NET-EN or DMPA compared with women not using any hormonal method [incidence rate ratios and 95% confidence intervals, 0.65, 0.16-2.66; 0.79, 0.31-2.02 and 0.96, 0.58-1.59, respectively]. There was also no association between increased duration of DMPA use and HIV incidence (P-value for trend, 0.51).

CONCLUSIONS

These findings contribute to the evidence from general population cohorts of women that hormonal contraceptive use is not associated with increased risk of HIV acquisition. Nonetheless, family planning services are an important venue for HIV prevention activities.

Reproduction and fertility in human immunodeficiency virus type-1 infection

Human immunodeficiency virus type-1 (HIV-1) affects mostly men and women in their reproductive years. For those who have access to highly active antiretroviral therapy (HAART), the course of HIV-1 infection has shifted from a lethal to a chronic disease. As a result of this, many patients with HIV-1 consider having offspring, as do other patients of reproductive age with chronic illnesses. This article summarizes the current knowledge on the presence of HIV in the male and female genital tract, the effects of HIV-1 infection and HAART on male and female fertility and the results of various assisted reproduction techniques (ART) in HIV-1-infected men and women who wish to have offspring.

Coital bleeding and HIV risks among men and women in Cape Town, South Africa

BACKGROUND

South Africa has one of the world's fastest growing HIV epidemics. Genital bleeding during sexual intercourse may play a role in facilitating HIV transmission in South Africa.

PURPOSE

The purpose of this study was to examine the prevalence and sources of coital bleeding among men and women living in a Cape Town South Africa township.

METHODS

A purposive sample of 464 men and 531 women completed anonymous street intercept surveys of HIV risk history and sexual behaviors.

RESULTS

Thirty-one percent of men and 26% of women had a lifetime history of engaging in sexual intercourse that involved genital bleeding, and 21% of men and 16% of women reported coital bleeding in the previous 3 months. Over 75% of coital bleeding was attributed to menses. Across genders and controlling for demographic, sexual behavior, and life history factors, coital bleeding in the previous 3 months was associated with being an indigenous African, having multiple sexual partners, and higher rates of unprotected intercourse during that time period. People who reported coital bleeding were over 3 times more likely to have been diagnosed with a sexually transmitted infection even after controlling for having had genital ulcers.

CONCLUSIONS

Coital bleeding may be common in South Africa. Prevention messages that promote condom use or refraining from sex when there is genital bleeding are therefore needed.

Survival of micro-organisms in cryostorage of human sperm

The authors describe the clinical application of semen cryostorage, survival of micro-organism during cryostorage procedures and the risk of cross-contamination.

HIV/AIDS epidemiology, pathogenesis, prevention, and treatment

The HIV-1 pandemic is a complex mix of diverse epidemics within and between countries and regions of the world, and is undoubtedly the defining public-health crisis of our time. Research has deepened our understanding of how the virus replicates, manipulates, and hides in an infected person. Although our understanding of pathogenesis and transmission dynamics has become more nuanced and prevention options have expanded, a cure or protective vaccine remains elusive. Antiretroviral treatment has transformed AIDS from an inevitably fatal condition to a chronic, manageable disease in some settings. This transformation has yet to be realised in those parts of the world that continue to bear a disproportionate burden of new HIV-1 infections and are most affected by increasing morbidity and mortality. This Seminar provides an update on epidemiology, pathogenesis, treatment, and prevention interventions pertinent to HIV-1.

HIV and reproductive care—a review of current practice

In developed countries, antiretroviral treatment has increased life quality and expectancy of HIV-infected individuals and led to a drop in mother-to-child transmission (MCT) risk to below 1%. Fertility has been shown to be reduced in both men and women with HIV. As a result of these factors, the demand for reproductive care in this population is rising. In discordant couples where the man is positive, sperm washing significantly reduces viral transmission risk to the uninfected female partner over unprotected intercourse. Positive women do not necessarily need specialised fertility treatment but should be monitored closely during pregnancy to minimise MCT risk.

Oral transmission of HIV, reality or fiction? An update

Human immunodeficiency virus (HIV) and many other viruses can be isolated in blood and body fluids, including saliva, and can be transmitted by genital-genital and especially anal-genital sexual activity. The risk of transmission of HIV via oral sexual practices is very low. Unlike other mucosal areas of the body, the oral cavity appears to be an extremely uncommon transmission route for HIV. We present a review of available evidence on the oral-genital transmission of HIV and analyse the factors that act to protect oral tissues from infection, thereby reducing the risk of HIV transmission by oral sex. Among these factors we highlight the levels of HIV RNA in saliva, presence of fewer CD4+ target cells, presence of IgA antibodies in saliva, presence of other infections in the oral cavity and the endogenous salivary antiviral factors lysozyme, defensins, thrombospondin and secretory leucocyte protease inhibitor (SLPI).

Unprotected Sex Among HIV-Positive Injection Drug-Using Women and Their Serodiscordant Male Partners

We investigated the characteristics of human immunodeficiency virus (HIV)-positive injection drug-using women who reported unprotected vaginal and/or anal sex with HIV-negative or unknown serostatus (serodiscordant) male partners. Of 426 female study participants, 370 were sexually active. Of these women, 39% (144/370) and 40% (148/370) reported vaginal and/or anal sex with serodiscordant main and casual partners, respectively. Sixty percent of women inconsistently used condoms with their serodiscordant main partners, whereas 53% did so with casual partners. In multivariate analysis, during sex with main partners, inconsistent condom users were less likely to feel confident about achieving safe sex (self-efficacy), personal responsibility for limiting HIV transmission, and that their partner supported safe sex. Inconsistent condom use was also more likely among women who held negative beliefs about condoms and in couplings without mutual disclosure of HIV status. Regarding sex with casual partners, inconsistent condom users were more likely to experience psychologic distress, engage in sex trading, but they were less likely to feel confident about achieving safe sex. These findings suggest that there are widespread opportunities for the sexual transmission of HIV from drug-using women to HIV-uninfected men, and that reasons vary by type of partnership. Multifaceted interventions that address personal, dyadic, and addiction problems are needed for HIV-positive injection drug-using women.

Impact of drug treatment on subsequent sexual risk behavior in a multisite cohort of drug-using women: a report from the Women's Interagency HIV Study

BACKGROUND

The evidence that drug treatment programs are associated with changes in sexual behavior and, thus, have prevention benefits beyond addiction is inconclusive. We examined whether entry into drug treatment was associated with subsequent alterations in sexual behavior among a group of drug-using women.

METHODS

Data were collected semiannually via structured interviews over 8 years. Generalized estimating equations evaluated the relationship between self-reported drug treatment at each visit and sexual abstinence and consistent condom use in the subsequent 6-month period.

RESULTS

In this sample (N = 1,658; mean age, 37.3 years; 57.5% African American; 80.3% HIV positive; 49.6% crack/cocaine users), 40% reported being in a variety of drug treatment programs. Those undergoing drug treatment (vs. those not) were less likely to become sexually active (adjusted odds ratio [AOR], 0.83; 95% confidence interval [CI], 0.76-0.91); this association was unchanged when the frequency of attendance and number of different drug treatment programs were evaluated. Drug treatment was not associated with subsequent consistent condom, regardless of frequency of attendance, but involvement in at least three treatment programs was (AOR, 1.40; 95% CI, 1.00-1.97).

CONCLUSIONS

Additional efforts are needed to integrate effective sexual risk reduction programs into drug treatment settings; expanding access to different types of drug treatment modalities may be indicated.

Assisted reproduction for HIV-infected couples

Many HIV-infected individuals are in relationships with HIV-uninfected partners and desire to have children. This review focuses on the issue of reproductive choices for these couples, in particular assisted reproductive technologies, and summarises the published outcome data currently available. The results thus far from assisted reproductive technologies in optimising pregnancy outcomes and reducing heterosexual and perinatal HIV transmission are promising. In the future, it is essential that there is ongoing reporting of outcome data, publication of methodology and follow-up, and reporting of adverse outcomes.

Can population differences explain the contrasting results of the Mwanza, Rakai, and Masaka HIV/sexually transmitted disease intervention trials?: A modeling study

OBJECTIVE

To determine whether population differences can explain the contrasting impacts on HIV observed in the Mwanza trial of sexually transmitted disease (STD) syndromic treatment (ST), the Rakai trial of STD mass treatment (MT), and the Masaka trial of information, education, and communication (IEC) with and without ST as well as to predict the effectiveness of each intervention strategy in each population.

METHODS

Stochastic modeling of the transmission of HIV and 6 STDs was used with parameters fitted to demographic, sexual behavior, and epidemiological data from the trials and general review of STD/HIV biology.

RESULTS

The baseline trial populations could be simulated by assuming higher risk behavior in Uganda compared with Mwanza in the 1980s, followed by reductions in risk behavior in Uganda preceding the trials. In line with trial observations, the projected HIV impacts were larger for the ST intervention in Mwanza than for the MT intervention in Rakai or the IEC and IEC + ST interventions in Masaka. All 4 simulated intervention strategies were more effective in reducing incidence of HIV infection in Mwanza than in either Rakai or Masaka.

CONCLUSIONS

Population differences in sexual behavior, curable STD rates, and HIV epidemic stage can explain most of the contrast in HIV impact observed between the 3 trials. This study supports the hypothesis that STD management is an effective HIV prevention strategy in populations with a high prevalence of curable STDs, particularly in an early HIV epidemic.

Herpes simplex virus 2 infection increases HIV acquisition in men and women: systematic review and meta-analysis of longitudinal studies

OBJECTIVE

To estimate the sex-specific effect of herpes simplex virus type 2 (HSV-2) on the acquisition of HIV infection.

BACKGROUND

The increased number of longitudinal studies available since the last meta-analysis was published allows for the calculation of age- and sexual behaviour-adjusted relative risks (RR) separately for men and women.

DESIGN

Systematic review and meta-analysis of longitudinal studies.

METHODS

PubMed, Embase and relevant conference abstracts were systematically searched to identify longitudinal studies in which the relative timing of HSV-2 infection and HIV infection could be established. Where necessary, authors were contacted for separate estimates in men and women, adjusted for age and a measure of sexual behaviour. Summary adjusted RR were calculated using random-effects meta-analyses where appropriate. Studies on recent HSV-2 incidence as a risk factor for HIV acquisition were also collated.

RESULTS

Of 19 eligible studies identified, 18 adjusted for age and at least one measure of sexual behaviour after author contact. Among these, HSV-2 seropositivity was a statistically significant risk factor for HIV acquisition in general population studies of men [summary adjusted RR, 2.7; 95% confidence interval (CI), 1.9-3.9] and women (RR, 3.1; 95% CI, 1.7-5.6), and among men who have sex with men (RR, 1.7; 95% CI, 1.2-2.4). The effect in high-risk women showed significant heterogeneity, with no overall evidence of an association.

CONCLUSIONS

Prevalent HSV-2 infection is associated with a three-fold increased risk of HIV acquisition among both men and women in the general population, suggesting that, in areas of high HSV-2 prevalence, a high proportion of HIV is attributable to HSV-2.

Intravaginal practices, bacterial vaginosis, and women's susceptibility to HIV infection: epidemiological evidence and biological mechanisms

Intravaginal practices such as "dry sex" and douching have been suggested as a risk factor that may increase women's susceptibility to HIV infection. These behaviours appear common in different populations across sub-Saharan Africa, where practices include the use of antiseptic preparations, traditional medicines, or the insertion of fingers or cloths into the vagina. We systematically review the evidence for the association between women's intravaginal practices and HIV infection. Although a number of cross-sectional studies have shown that prevalent HIV infection is more common among women reporting intravaginal practices, the temporal nature of this association is unclear. Current evidence suggests that bacterial vaginosis, which is a likely risk factor for HIV infection, may be a mediator of the association between intravaginal practices and HIV. Although biologically plausible mechanisms exist, there is currently little epidemiological evidence suggesting that intravaginal practices increase women's susceptibility to HIV infection. Further research into factors that increase women's susceptibility to HIV will help to inform the design of vaginal microbicides and other HIV prevention interventions.

Deaths of HIV-positive men in the context of assisted reproduction: five case studies from a single center

Provision of reproductive services to individuals infected with HIV-1 is gaining popular acceptance and is generally endorsed by specialists in reproductive medicine. In the situation in which the male is HIV positive and the female partner is not infected, a large body of evidence has demonstrated that the use of assisted reproductive technology is effective for achieving pregnancy, while eliminating the risk of viral transmission to the mother and fetus. No reports have documented the well-being of the HIV-infected partners subsequent to seeking fertility services. In the current report, we document the cases of five HIV-positive men who died secondary to complications of HIV infection shortly after participating in the assisted reproduction program for HIV-1-serodiscordant couples at Columbia University. Three of these couples successfully achieved pregnancy and live birth, including one set of triplets, and one case of posthumous conception; the fourth case resulted in the cryopreservation of all embryos after the sudden death of the male before the time of embryo transfer; the fifth couple failed to conceive. None of the deaths, which occurred within a few months to 2 years from initial consultation, were related to infertility treatment. The demographic and social statuses of these patients were not different from the general population of men seeking assisted reproduction in our clinic. Regarding the HIV infection status of these cases, three patients had a longer duration of infection compared to the general population of men in our cohort, and one had a significantly lower CD4 cell count. All five men had stable HIV viral loads, and were determined by their primary care providers to be clinically healthy at the time of entry into the program for assisted reproduction. The untimely deaths of these patients underscores the importance of the thoughtful consideration of the complex issues involved in family planning for these individuals, including advanced directives for the use of cryopreserved gametes and embryos, and the social, emotional, and practical issues for the children and surviving partners subsequent to the death of the HIV-positive parent.

AIDS: The Second Wave

Over two decades ago, the first cases of a new disease now known as AIDS were described in the literature. Since then, remarkable advances have been made, a new retrovirus has been discovered, promising antiviral agents have been developed and affordable and effective preventive interventions exists. Yet the AIDS pandemic continues largely unabated. AIDS is the world's leading infectious disease cause of death and threatens to devastate the economic systems of resource-poor nations. Over the next decade the HIV epidemic is expected to continue to grow with an increasing proportion of infected persons residing in developing countries and increasingly affecting young women. However, reducing the burden of HIV/AIDS is achievable, and there is some cause for cautious optimism.

Cultural approach to HIV/AIDS harm reduction in Muslim countries

Muslim countries, previously considered protected from HIV/AIDS due to religious and cultural norms, are facing a rapidly rising threat. Despite the evidence of an advancing epidemic, the usual response from the policy makers in Muslim countries, for protection against HIV infection, is a major focus on propagating abstention from illicit drug and sexual practices. Sexuality, considered a private matter, is a taboo topic for discussion. Harm reduction, a pragmatic approach for HIV prevention, is underutilized. The social stigma attached to HIV/AIDS, that exists in all societies is much more pronounced in Muslim cultures. This stigma prevents those at risk from coming forward for appropriate counseling, testing, and treatment, as it involves disclosure of risky practices. The purpose of this paper is to define the extent of the HIV/AIDS problem in Muslim countries, outline the major challenges to HIV/AIDS prevention and treatment, and discuss the concept of harm reduction, with a cultural approach, as a strategy to prevent further spread of the disease. Recommendations include integrating HIV prevention and treatment strategies within existing social, cultural and religious frameworks, working with religious leaders as key collaborators, and provision of appropriate healthcare resources and infrastructure for successful HIV prevention and treatment programs in Muslim countries.

Primary prevention of sexually transmitted disease: applying the ABC strategy

Escalating rates of sexually transmitted disease (STD) in many areas of the world necessitate a re-evaluation of current public health STD preventive programmes. Pervasive long term sequelae for many STD afflicted people and the emerging threat, caused by the HIV/AIDS pandemic, to some national infrastructures, suggests that ongoing initiatives focusing primarily on risk reduction through barrier protection have not met their desired objective. Recent strategies to promote non-coital sexual involvement as a means of achieving STD reduction fail to address the transmission of infection that may occur through alternative non-intercourse sexual activities. The demonstrated success of the innovative, comprehensive ABC strategy shows that while risk reduction and treatment of existing infection remain important, the promotion of optimal health may be achieved more effectively through broad based comprehensive and adaptable programmes that include an emphasis on risk avoidance through delayed sexual debut and partner reduction.

Effectiveness of Highly Active Antiretroviral Therapy in Reducing Heterosexual Transmission of HIV

Highly active antiretroviral therapy (HAART) has been shown to be highly effective in reducing plasma levels of HIV RNA; therefore, these treatments could diminish the risk of transmission. We analyzed 393 steady heterosexual couples, of which one partner had been previously diagnosed with HIV infection (index case) and where the nonindex partner reported his or her sexual relationship with the index case as the unique risk exposure. These couples were consecutively enrolled in the period 1991 through 2003 when the nonindex partners took their first HIV test. HIV prevalence among partners of index cases who had not received antiretroviral therapy was 8.6%, whereas no partner was infected in couples in which the index case had been treated with HAART (P = 0.0123). HIV prevalence among nonindex partners declined from 10.3% during the pre-HAART period (1991-1995) to 1.9% during the late HAART period (1999-2003; P = 0.0061). In the multivariate analysis, this decline held (odds ratio = 0.14, 95% confidence interval: 0.03-0.66) after adjusting for length of partnership, unprotected coitus, and pregnancies as well as gender, CD4 lymphocyte count, AIDS-defining diseases, and sexually transmitted infections in the index case. When HAART became widely available, a reduction of approximately 80% in heterosexual transmission of HIV was observed, irrespective of changes in other factors that affect transmission.

Increasing Condom Use Without Reducing HIV Risk

BACKGROUND

Although consistent condom use is effective in reducing individual risk for HIV infection, the public health impact of condom promotion in a generalized epidemic is less clear. We assess the change in condom uptake and number of sex partners after a condom promotion trial in Kampala, Uganda.

METHODS

Two similar poor urban communities near Kampala were randomized. One received a condom promotion program that taught condom technical use skills in workshops for men aged 18 to 30 years (n = 297) and encouraged condom use. Men in the control community (n = 201) received a brief informational presentation about AIDS. Participants received coupons redeemable for free condoms from distributors in both communities and completed questionnaires at baseline and 6 months later.

RESULTS

Six-month follow-up was completed for 213 men (71.7%) in the intervention group and for 165 (82.1%) men in the control group. Men in the intervention group redeemed significantly more condom coupons than men in the control group (on average, 110 vs. 13 each; P = 0.002). Men in the intervention group increased their number of sex partners by 0.31 compared with a decrease of 0.17 partners in the control group (P = 0.004). Other measures did not support a net reduction in sexual risk in the intervention community compared with the control community and, in fact, showed trends in the opposite direction.

CONCLUSIONS

In this study, gains in condom use seem to have been offset by increases in the number of sex partners. Prevention interventions in generalized epidemics need to promote all aspects of sexual risk reduction to slow HIV transmission.

Metaanalysis and metaregression in interpreting study variability in the impact of sexually transmitted diseases on susceptibility to HIV infection

BACKGROUND

Observational studies examining the effects of other sexually transmitted diseases (STDs) on HIV susceptibility differ in the populations observed and in which "other STDs" are examined. The extent to which an STD alters the risk of transmission of HIV may vary according to disease and population characteristics.

GOALS

The goals of this study were to review studies examining the effect of other STDs on HIV-1 susceptibility and to correlate their effect estimates with type of "other STD", study design, and population characteristics.

STUDY

Relevant studies with longitudinal design were identified through a systematic search of the PubMed database, and their evidence was critically evaluated. Metaregression techniques were then used to correlate study characteristics with corresponding effect estimates.

RESULTS

Of 31 studies included, 4 contained direct data on exposure to HIV-1. Three of these were inconclusive, the fourth indicating a strong relationship between STDs and transmission of HIV. Pooled effect estimates using all studies are statistically significant and indicate a 2- to 3-fold increase in risk of HIV-1 acquisition. Effect estimates corresponding some of the "other STD" categories exhibit heterogeneity, but no significant associations with study characteristics were found.

CONCLUSIONS

Most of the studies lack direct exposure data, lending them susceptible to exposure bias. Another problem may be measurement error about risk factors and STD status at time of HIV-1 infection. Because direct exposure data are difficult to come by (4 of 31 studies contained such data, all but 1 inconclusive), future observational studies on the influence of STDs on HIV-1 transmission should include quantitative analyses of the sensitivity of results to potential confounding and measurement error if they are to further understanding.

Risky sexual behavior in low-income African American women: the impact of sexual health variables

In a sample of 163 low-income African American women, we used logistic regression analyses to test for associations between (a) 5 operationalized constructs theorized in the Sexual Health Model to impact one's overall sexual health (barriers to healthy sexuality, sexual anatomy and functioning, positive sexuality, sexual health care, and cultural identity) and (b) several measures of risky sexual behavior (consistent condom use, multiple concurrent partnerships, and overall sexual risk). No significant relationship was found between acculturation and risky sexual behaviors. Having sexual difficulties was positively associated with overall sexual risk and multiple concurrent partnerships. Favorable attitudes toward condoms were positively associated with consistent condom use. Desiring or intending pregnancy was positively associated with inconsistent condom use and overall sexual risk behavior This is only the second study linking sexual difficulties and risky sexual behavior The exact nature of this correlational relationship needs to be studied and replicated in different and more heterogeneous populations.

Trichomonas vaginalis-induced epithelial monolayer disruption and human immunodeficiency virus type 1 (HIV-1) replication: implications for the sexual transmission of HIV-1

The objective of this study was to evaluate potential mechanisms of Trichomonas vaginalis involvement in human immunodeficiency virus type 1 (HIV-1) transmission. Polarized monolayer integrity of primary cervical and prostate epithelial cells or cell lines cultured with T. vaginalis was measured by monitoring transepithelium resistance. The effect of T. vaginalis isolates on HIV-1 passage through polarized epithelial cell monolayers was evaluated for HIV-1 p24gag in the basolateral supernatants. Coincubation with T. vaginalis isolates induced disruption of monolayer integrity and resulted in passage of virus to the basolateral side of the monolayer. Furthermore, there was isolate variability in which two isolates induced greater monolayer damage and increased HIV-1 passage than did the other two isolates. Coincubation of T. vaginalis isolates with acutely HIV-1-infected peripheral blood mononuclear cells enhanced HIV-1 replication. This enhancement was associated with cellular proliferation and activation, as well as with tumor necrosis factor alpha production. In contrast to the monolayer disruption, the effect of T. vaginalis on HIV-1 replication was not isolate dependent. Thus, two mechanisms have been identified that could contribute to the epidemiologic association of trichomoniasis with the sexual transmission of HIV-1. (i) T. vaginalis disruption of urogenital epithelial monolayers could facilitate passage of HIV-1 to underlying layers. (ii) Activation of local immune cells by T. vaginalis in the presence of infectious HIV-1 might lead to increased viral replication. Collectively, these data suggest the need for more vigilant efforts in the diagnosis and treatment of T. vaginalis in women and men, especially in countries with a high prevalence of HIV-1.

ICSI for treatment of human immunodeficiency virus and hepatitis C virus-serodiscordant couples with infected male partner

BACKGROUND

Assisted reproductive technology with semen washing can offer a significant reduction in risk of sexual and vertical transmission of human immunodeficiency virus (HIV) and hepatitis C virus (HCV) in serodiscordant couples with infected male partner.

METHODS

Among couples coming to our centre for reproductive problems from January 2001 to December 2003, we selected 43 couples with seropositive male and seronegative female: 25 couples with HIV-seropositive males, 10 couples with HIV/hepatitis C virus (HCV)-seropositive males and eight couples with HCV-seropositive males. Sperm samples were washed and used for ICSI.

RESULTS

Seventy-eight cycles of ICSI were performed. The mean fertilization rate was 70.34 +/- 20.14% (mean +/- SD). A mean number of 3.55 +/- 1.11 (range: 1-5) embryos of good quality was transferred for each patient. We obtained 22 pregnancies (21 singletons and one twin), with a pregnancy rate per transfer of 28.2% and an implantation rate per transfer of 15.2%. The cumulative pregnancy rate was 51.2%. At follow-up, no seroconversion was detected in any patient.

CONCLUSIONS

Our data suggest that sperm wash and ICSI could be useful for reducing the risk of HIV and/or HCV transmission in serodiscordant couples with infected male wishing to have a child, irrespective of their fertility status.

Estimating the Impact of Establishing Family Housing on the Annual Risk of HIV Infection in South African Mining Communities

OBJECTIVE

The objective of this study was to determine the HIV-related epidemiologic impact of establishing family-style housing in mining communities in South Africa.

METHODS

Modeling sex acts as independent Bernoulli trials, the estimated impact of converting to family housing arrangements on the annual risk of HIV infection is calculated and the differential effects on migrants and their partners is explored.

RESULTS

Family housing could reduce HIV transmission among migrants and their partners in South Africa. Given baseline estimates, the predicted net reduction in the annual risk of HIV infection with family housing is 0.0254 and 0.0305 for short- and long-stay couples respectively. A reduction in the annual risk of HIV infection under family housing depends on the proportion of HIV negative concordance among couples. HIV-negative concordance among couples above 22% provides reductions in the annual risk of HIV infection under family housing.

CONCLUSIONS

The results indicate that family housing could decrease HIV transmission among HIV-negative concordant couples, indicating that this policy alternative should be examined closely to assess its viability and use as a prevention method.

The effects of urethritis on seminal plasma HIV-1 RNA loads in homosexual men not receiving antiretroviral therapy

OBJECTIVES

To examine the effects of urethritis and its treatment on semen plasma HIV-1 RNA load in HIV-1 infected men not receiving antiretroviral therapy (ART), in a developed world setting.

METHODS

Prospective case-control study. HIV-1 infected homosexual men, not receiving ART for at least 3 months, with (cases) and without (controls) symptomatic urethritis, were recruited. Blood and semen were collected for HIV-1 RNA quantification at presentation, before antibiotic therapy, and at 1 and 2 weeks.

RESULTS

20 cases (13 gonococcal urethritis and/or chlamydial urethritis (GU/CU) and seven non-specific urethritis (NSU)) and 35 controls were recruited. Baseline characteristics and blood plasma viral load were similar in cases and controls. Mean log semen plasma viral loads were higher among those with GU/CU compared with controls (4.27 log versus 3.55 log respectively; p = 0.01) but not in those with NSU (3.48 log; p = 0.82). Following antibiotics, semen plasma viral loads fell by a mean of 0.25 log (95% CI: 0.03 to 0.47) in those with GU/CU. Semen plasma viral loads did not fall in those with NSU.

CONCLUSIONS

In this study of 55 homosexual men not on ART, semen plasma viral loads were approximately fivefold higher in those with GU/CU, but not NSU, compared with controls. Treatment of GU/CU resulted in reduction in semen plasma viral loads. Although absolute effects were considerably lower when compared to patients from a similar study from sub-Saharan Africa, our data demonstrate the potential for sexually transmitted infections to enhance HIV infectivity of men not receiving ART in the developed world.

Recruitment of minority women and their main sexual partners in an HIV/STI prevention trial

Recruiting heterosexual couples into randomized clinical trials (RCTs) to test the efficacy of HIV/sexually transmitted infection (STI) prevention interventions is a challenge that requires innovative strategies and consideration of ethical issues, including participant safety and confidentiality.

METHODS

This paper provides a brief review of the literature on minority and couple RCT recruitment and describes the development (preparation phase and protocol development) and implementation (strategies employed and barriers) of a recruitment protocol that safely enrolled 217 predominantly African American and Latino heterosexual couples into a relationship-based, HIV/STI prevention study.

RESULTS

The success of this recruitment protocol with no reported adverse events demonstrates the feasibility of engaging urban minority women and men in RCTs. This study builds on a small literature base articulating specific couple recruitment strategies.

CONCLUSION

More research delineating and testing specific strategies for recruiting defined populations into clinical trials is needed to advance the science of study recruitment and improve generalizability of research findings.

Laboratory safety during assisted reproduction in patients with blood-borne viruses

For couples where one or both partners are infected with human immunodeficiency virus or hepatitis C, the doors to receiving fertility care are opening as a result of better antiviral medication, better long-term prognosis and consequent changes in attitude. In line with this, fertility centres electing to treat couples with blood-borne viral (BBV) infection need to re-examine their policies and procedures to ensure the safety of their staff and both non-infected and infected patients during assisted reproduction treatments. At a time when the European Tissue Directive aims to introduce quality standards for assisted reproduction throughout Europe, we highlight the risks involved when treating patients with known BBV infections and argue that safety cannot be met with any certainty unless samples from such patients are handled within a separate high security laboratory or laboratory area, technically adapted to ensure minimal cross-contamination risk to uninfected gametes and embryos.

Sexual harm reduction practices of HIV-seropositive gay and bisexual men: serosorting, strategic positioning, and withdrawal before ejaculation

OBJECTIVE

This study assessed unprotected anal and oral sex behaviors of HIV-positive gay and bisexual men in New York City and San Francisco with their main and non-main sexual partners. Here we focus on the use of three harm reduction strategies (serosorting, strategic positioning, and withdrawal before ejaculation) in order to decrease transmission risk.

METHOD

The data from a baseline assessment of 1168 HIV-positive gay and bisexual men in the two cities were utilized. Men were recruited from a variety of community-based venues, through advertising and other techniques.

RESULTS

City differences were identified, with more men in San Francisco reporting sexual risk behaviors across all partner types compared with men in New York City. Serosorting was identified, with men reporting significantly more oral and anal sex acts with other HIV-positive partners than with HIV-negative partners. However, men also reported more unprotected sex with partners of unknown status compared with their other partners. Some evidence of strategic positioning was identified, although differences were noted across cities and across different types of partners. Men in both cities reported more acts of oral sex without ejaculation than with ejaculation, but the use of withdrawal as a harm reduction strategy for anal sex was more common among men from San Francisco.

CONCLUSION

Overall, evidence for harm reduction was identified; however, significant differences across the two cities were found. The complicated nature of the sexual practices of gay and bisexual men are discussed, and the findings have important implications for prevention efforts and future research studies.

Cost-effectiveness of screening for HIV in the era of highly active antiretroviral therapy

BACKGROUND

The costs, benefits, and cost-effectiveness of screening for human immunodeficiency virus (HIV) in health care settings during the era of highly active antiretroviral therapy (HAART) have not been determined.

METHODS

We developed a Markov model of costs, quality of life, and survival associated with an HIV-screening program as compared with current practice. In both strategies, symptomatic patients were identified through symptom-based case finding. Identified patients started treatment when their CD4 count dropped to 350 cells per cubic millimeter. Disease progression was defined on the basis of CD4 levels and viral load. The likelihood of sexual transmission was based on viral load, knowledge of HIV status, and efficacy of counseling.

RESULTS

Given a 1 percent prevalence of unidentified HIV infection, screening increased life expectancy by 5.48 days, or 4.70 quality-adjusted days, at an estimated cost of 194 dollars per screened patient, for a cost-effectiveness ratio of 15,078 dollars per quality-adjusted life-year. Screening cost less than 50,000 dollars per quality-adjusted life-year if the prevalence of unidentified HIV infection exceeded 0.05 percent. Excluding HIV transmission, the cost-effectiveness of screening was 41,736 dollars per quality-adjusted life-year. Screening every five years, as compared with a one-time screening program, cost 57,138 dollars per quality-adjusted life-year, but was more attractive in settings with a high incidence of infection. Our results were sensitive to the efficacy of behavior modification, the benefit of early identification and therapy, and the prevalence and incidence of HIV infection.

CONCLUSIONS

The cost-effectiveness of routine HIV screening in health care settings, even in relatively low-prevalence populations, is similar to that of commonly accepted interventions, and such programs should be expanded.

Clinical microbicide research: an overview

At the end of 2003, 42 million people were HIV infected and the epidemic continues to spread, despite the availability and effectiveness of male condoms. For many women negotiating condom use is not feasible. Therefore there is an urgent need for a female controlled method for HIV prevention. This article gives an overview of the clinical research done with microbicides, chemicals with the potential to prevent an HIV infection. In the 1990s most research was done with spermicides, mainly nonoxynol-9. Since the results of the COL-1492 trial became available, new products were evaluated and some of them are now in phase III trials.

[Women who are partners of a man infected by HIV: description of their characteristics and appraisal of risk]

OBJECTIVE

To describe the situations of risk and the prevalence of HIV in women with a heterosexual partner infected by HIV.

DESIGN

Cross-sectional descriptive study.

SETTING

Out-patient HIV diagnosis centre in Madrid.

PATIENTS

229 women seen for the first time between 1993 and 2002 because they had a stable heterosexual partner diagnosed with HIV, and who were exposed to no other risk.

MAIN MEASUREMENTS

Social and personal details, reproduction history, sexual conduct, clinical, and analytic data of both partners.

RESULTS

66% of couples had maintained sexual relations for over a year. Women were on average younger (29.6 years old) than the men. 29% of the women had children and 5.2% were pregnant. 82% of men had injected drugs, but only 13% still did. 73% had been diagnosed with HIV for over 6 months, 16% had AIDS criteria, and 35% were taking retroviral treatment. 60% of the men who knew of their infection had systematically avoided sex without condoms, against 33% of those who did not know they were infected (P<.001). 19% had had accidents in use of the condom. HIV seroprevalence in the women was 6.1% (95% CI, 3.5%-10.3%).

CONCLUSIONS

Health care of people with HIV must include care of their sexual partner, involving information, psychological support, preventive and reproductive advice, as well as diagnosis of HIV or other sexually transmitted diseases.

Report of the results of a 2 year programme of sperm wash and ICSI treatment for human immunodeficiency virus and hepatitis C virus serodiscordant couples

BACKGROUND

Human immunodeficiency virus (HIV) and hepatitis C virus (HCV) serodiscordant couples with the male infected can be helped to have children minimizing the transmission risk. Our aim was to evaluate the results of our assisted reproduction programme for these couples and to develop adequate strategies for their management.

METHODS

Members of serodiscordant couples: (i) HIV positive males attending our centre for sperm wash and assisted reproduction and (ii) HCV positive males needing assisted reproduction for infertility provided 134 semen samples for sperm wash. Before ICSI treatment, semen was confirmed to be negative for viral presence by reverse transcription and nested PCR after the sperm wash.

RESULTS

Sperm washes were effective in 90% of the samples. Regardless of the type of infection, no differences were found in semen quality, embryos obtained and pregnancy rates (40-48% per cycle). To date, 41 pregnancies and 23 newborns were obtained. Fertilization rates were lower in HCV than in HIV serodiscordant couples (59.3+/-5.3% versus 72.0+/-8.1%), probably because they were infertile couples for whom we recommended sperm wash and PCR. No seroconversion was detected in the patients' follow-up.

CONCLUSIONS

To date, sperm wash, nested PCR and ICSI is a safe and effective procedure that avoids HIV and HCV transmission with reasonable pregnancy rates, and is cost-effective.

Managing the sexually transmitted disease pandemic: a time for reevaluation

The serious implications of the sexually transmitted disease (STD) pandemic that currently challenges educators, medical practitioners and governments suggest that prevention strategies, which primarily focus on barrier protection and the management of infection, must be reevaluated and that initiatives focusing on primary prevention of behaviors predisposing individuals to STD risk must be adopted. Human immunodeficiency virus/acquired immunodeficiency syndrome, human papillomavirus, genital herpes, and Chlamydia are used to illustrate the pervasive presence of STDs and their serious consequences for individuals and national infrastructures. Long-term sequelae are discussed, including the emerging link between various sexually transmitted infections and cancer, and the psychosexual and psychosocial factors which impact infected individuals. Although risk reduction and treatment of existing infection is critical, the promotion of optimal life-long health can be achieved most effectively through delayed sexual debut, partner reduction, and the avoidance of risky sexual behaviors.

Attitudes towards male condom use in two different populations in Thrace, Greece

OBJECTIVE

To outline Thracian women's disposition and attitude towards the male condom.

METHODS

Representatives of the two major religious subgroups in Thrace (127 Christian Orthodox and 120 Muslim women) were studied. All respondents were of reproductive age (from 17 to 39 years) and were encouraged to answer a specific questionnaire. Women expressed their opinions about their mood while using it, its safety and similarity to natural contraception, and its contribution to the prevention of carcinogenesis and sexually transmitted diseases (STDs). They were also questioned about the ease of accessibility to supplies, the convenience experienced in buying it, its cost, and whether they thought it was necessary to use one in every act of intercourse as a contraceptive method. The statistical software package used was the Sigma Stat 2.0.

RESULTS

The majority of the respondents in both subgroups had a positive opinion about the condom's contribution to the prevention of acquired immune deficiency syndrome (AIDS) and STDs. Christians were better informed about the condom's contribution to the prevention of carcinogenesis, while the majority of Muslims did not feel convinced about the condom's contraceptive efficacy.

CONCLUSIONS

The study results reveal a significant difference in the way that Christian and Muslim women in Thrace consider the impact of condom use on sexual behavior and reproductive health care.